<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
	<script>
		let str = 'abcdefg'
		let res = str.indexOf('abcqwe') > -1
		console.log(res)
		console.log(str.indexOf('abcqwe'))
	</script>
</html>
